Excavating machine



Feb. 26 1924.11

M. E. PUGH EXCAVATING MACHINE 2 Sheets-Sheet l l Ad Filed Jan. 27 192 MyW-f Feb. 26 1924 M. E. PUGH EXGAVATING MACHINE 2 MM R. m

Filed Jan. 27 1923 nantaise ree. ae, ieee.

NORTON E. FUGH, F CHICAGO, ELLINIS.

EXCAVTING HACHXN'E.

Application :tiled January 27, 1923. Serial No. 615,228.

ful improvements in Excavating Machines,

of' which 'the following is a specification.

`The invention relates to excavating machines, and has among its variousotbjects 1o the provision of a means whereby the bucket which is ordinarily secured to the boom 0 the machine, maybe held with relation to the boom in either a dumping or digging position. The invention has as an additional object the provision of a means whereby the means for moving the boom may be employed for moving the bucket to either a dumping position or to a position from which itmay be moved to cause the digging operation to take lace. p It is an additional object -to provide a holding means which will co-operate with the means for actuating the bucket and the boom to hold the bucket in any of its various positions.

It is a further object of the invention to provide a holding means capable ot performing the above named functions, which :io is operable from the platform of the excavating machine.

it is a feature of the invention to pivotally connect the bucket with the boom and to provide an arrangement whereby the above named advantages may be obtained.

The invention has as a further object the provision of an improved bucket having an openable closure which includes an element to which the drag line is attached, this latter element being ymovable into the interior of the bucket to co-operate and cause the removal or discharge of the material in the bucket. when the closure is permitted to be opened. i

lt is a feature of the invent-ion toprovide a locking element for locking the closure in a closed position. this last named element also being movable into the interior of the bucket when the closure is opened'to cause 5o the material confined therein to be discharged therefrom.

The invention will be explained and more readily understood when read in conjunction with the accompanying drawings,4

which illustrate various embodiments 'of which the invention is susceptible, itbeing understood that various other arrangements and modilications may be resorted to without departing from the spirit of the appended claims forming a part hereof.

In the drawings, Fig. 1v is aside elevation of an excavating machine showing the boom and bucket in changed positions.

F ig. 2 is a plan view of a portion of the boom shown in the structure illustrated in v Fig. 1.

Fig. 3 is a side elevation of a portion of a boom showing a modified arrangement which may beresorted to, to accomplish one phase .of the invention.

Fig. 4 is a plan view of the structure shown in Fig. 3.

Fig. 5 is a side elevation of a slack adjusting brake mechanism employed in the structure. A

Fig. 6 is .a plan View of the structure shown in Fig. 5.

F ig. 7 is aside view of a portion of the brake mechanism employed for locking the bucket with relation to the boom.

Fig. 8 is a front elevation of the bucket illustrated in Fig. 1.

F ig. 9 is a top plan view of the structure shown in Fig. 8.

Fig. 10 is a plan view of the closure employed in connection with the bucket structure.

Fig. l1 is aside view of the closure illustrated in Fig. 10.

Figs. 12 and 13 are side elevations of the bucket illustrated in Fig. 8 respectively, showing the closure in an open and closed position.

Fig. 14 is a detail of a bar employed in the bucket structure.

Fig. 15 is a detail view of a clip employed in the structure, and Fig. 16 is a plan view of one of the cutters for the bucket and the supporting bar therefor.

In the embodiment of the invention illustrated in Fig. 1, a rotatable platform 20 is employed, to which a boom 21 is 'pivotally secured. This platform 20 carries variousl elements, such as an engine and tandem drum 22 and drum 23, the latter of which employs a slack adjusting brake mechanism in conjunction therewith. This entire structure is mounted upon a suitable truck such as that indicated at 2e. The boom 21 is bucket in this position, from which posi-4 tion it may be moved by the drag line 29,. which has one end secured to a suitable por.

tion of the bucket, and has its opposite end secured to a drum such as indicated at 22v y in Fig. 1, this drum being operable by the engine to cause a pulling strain to be eX- erted upon the cable 29 and cause the bucket to scoop or dig the material to be excavated., One of the tandem drums 22 above referred to is also adapted to have the cable 30 secured thereto, the latter of which rides over the sheaves 31 and 32 and the pulley 33 and has an end secured to the member 34. lt is manifest that as the cable 30 is wound upon or let oil-` from .one of the drums, such as 22, that the distance between the element 34 and the latform will be varied. A llexible connection or cable 35 is secured to the element 34 at 34a and extends therefrom over a. sheave 36 carriedk adjacent the outermost end of the boom 2l. This cable extends over the sheave 36 down and around the sheave 37 carried by the arm 38 of the bucket which as previously stated is pivotally secured to the boom at 27. This cable extends around the sheave 37 and around the shea-ve 39 and has its endsecured tothe sprocket chain section 40 which in turn rides over the sprocket 41 and has its opposite end secured as at 42 to the arm 38 of the bucket.

A brake drum 43 is secured to the sprocket wheel 41, both' of which are mounted upon the shaft 44. A brake-band 45 and weight 46a clearly illustrated in Fig. 7 is adapted to co-operate with the drum 43 to hold the cable 35 against relative movement with respect to the other elements enteringinto the structure. This will naturally prevent any relative movement of the bucket with respect to the boom. The connections formed by the cable 30, however, will permit. the boom to be raised and lowered to any de sired position with the bucket, while the bucket is held in any of its various positions. A lever 46 and weight 46*1 is connected to one end of the brake-band 45, the latter of which has its opposite end secured to some stationary portion of the structure. This lever 46 is connected by a link 47 with another lever 48 which is pivotally secured to the boom. A cable or other flexible connection 49 is employed, which has one end rescues l this operation.

.The particular structure of this brake is clearly illustrated in Figs. 5 and 6 and in cludes the brake-drum and the cable drum 56 which are both mounted in standards 57 and 58 which are secured to the platform 20 of the machine. A foot lever 59 is employed, which is pivoted at 60 to the frame and has a brake-band 61 secured thereto, and in addition has one end of a cable 62 attached to it, the latter of which f is secure-d to the drum 56. Thus it will be evident that as the lever 59 is actuated, a pull will be. exerted upon the cable 62 which will cause the rotation of the drum 56 and the drum 51, which will impart a rotative motion to the drum 52 and cause a pulling strain to be exerted upon the cable 49, which will actua-te and cause the holding mechanism for the dipper to hold the lattenin any of its various positions. A catch 63 is secured to the foot lever 59 and is adapted to co-operate with the pin 64 to hold the lever in its lowermost position, which will also cause the brake-band 61-to co-operate with the brake-drum 55' and hold these various elements against rotation, and thus manifestly prevent the actuation of the drum 43 of the-holding mechanism for the dipper. It is evident that when the pressure exerted by the brake-band 61 upon the brake-drum 55 is released, that the brake-band 45 of the holding mechanism will also be released, which will permit the bucket 26 to be moved by the cable 35 and its connections with the winding drum 22, or may, when so desired, v

be moved by the drag line 29 to cause the bucket to be moved during the digging operation.

ln Figs. 3 and 4, a modified arrangement for moving and releasably holding the dipper or bucket, is illustrated. ln this structure, the arm 65 is pivoted to the boom at 66 and extends a suitable distance above said pivot. A sprocket chain connection 67 is provided, the opposite ends oi" which are nated 68 and 69, are employed. A sprocket.

70 similar to the sproc et 41 is employed in this structure, over which. the chain 67 end of the arm 65 of the bucket is provided with a pair of pulleys 71 and 72, over which is arran ed a cable 73, the latter of which is suitab y secured to a pulley which will be arranged adjacent the pulley 32 illustrated and designated in Fig. 1. The brake mechanism of this structure includes a brake-band 7 4 and a brake-lever mechanism 75' which is secured through the medium of the cable 7 6 to a brake structure similar to that illustrated in Figs. 5 and 6. It is evident that this structure also permits the clipper or bucket to be moved to variouspositions relatively to the boom and releasably held in any one of these various positions.

The bucket 26 will have one end of a drag line 29 secured thereto, thisdrag line being arranged to ride over thepulley 7 8 carried by the boom and having an `end thereof secured to a drum such as that designated by the numeral 22 in Fig. 1. Thus it is evident that as the drum 22 is rotated, the drag line'29 will be wound thereon, which will move the bucket from the position. shown in dotted lines of Fig. 1 to any desired position and scoop up the material to be excavated. lt is manifest that the locking mechanism generally designated 28, may be operated to cause the bucket to be loc ed a position which the bucket assumes after it has completed its digging operation, in which position it may be moved with the boom to cause the material contained therein to be deposited at the desired oint. It is also evident that when this hol ing mechanism is released, and the cable such as 30 wound upon the drum such as 22, that the bucketv 26 will be moved through the medium of the chain and sprocket connection 40 and l1 to a dumping position. en the parts are in this lastnamed position, the bucket will be in position to perform a digging operation; upon the lowering of the boom.

The bucket illustrated'in Figs. 1 and 3 is shown in detail in Figs. 8 to 13 inclusive. This bucket is provided with an openable closure 79 which is pivotally secured to the bucket at 80. This closure has the arms 81 and 82 secured thereto, the free ends thereof being bent inwardly as indicated at 83 to provide a portion suitable for permitting the bar 84 to be secured thereto through the medium of one or more U-bolts 85. The bar 84 is provided with the recasses 86 for the reception of said U-bolts 85. The uppermost portion of the bucket 26 is preferably formed of a casting 8'? f which is designed yso as to receive the end of the arm 65 which is secured to the bucket. This casting 87 is designed so that it will readily permit the armsl81 and 82 to assume the dotted line position thereof illustrated in Fig. 12, when the closure 7 9 is caused to lassume the position shown in this figure. k'- lhe closure 79 has' its forward `portion or mouth-piece 99 provided with a plurality of cutting teeth 88 and the sides of the bucket are provided with a cutterA 89, most clearl shown in Figs. 8 and` 16. y A hinged locking device 90 is employed.

This locking device is composed of two elements 91 and 92 which are hingedly con nected together at 93 and are respectively secured to the opposite sides of thee bucket 26 as indicated at'94, and to the bar 84C. The drag line 29 is adapted to be attached to a chain connection 95 the opposite ends of which are respectively connected to the members 81 and 82 of the bail, as indicated at 96. A. dump chain 97 is secured to the chain 95 and extends through a loop 98 carried by the bar 84, and has one end secured adjacent the piv'ot 93 of the armsl 91 and 92 of the hinged locking ldevice 90. It is evident that`when a pulling strain is exerted upon the drag line 29, the arms 81 and`82 and the pivoted locking mech-` anisin 90 will be causedV to be withdrawn from the interior of the bucket until they assume the position thereof shown in Fig. 13, yfrom an inspection of which it can be readily seen that the pulling strain exerted upon .the drag'line 29 Will prevent the accidental operation of the locking mechanism, and thereby prevent the accidental discharge of the material confined within the bucket 26. However, when the pulling strain is released' from the' drag line 29, the arms 8l and 82 will swing upon the vpivot 80 and assume the dotted line position thereof shown in Fig. l2, it being understood that when the pulling strain is released from the drag line 29, the hinged is operable from the platform` of the ex-- cavating machine.

ldd

It is further evident that a bucket is pro1 vided which is constructed so that the material confined in the bucket will acted upon by the arms such as 81, and the elements 91 and 92 to cause the discharge.

thereof from the bucket.

Having thus fully described my invention, what I claim as new and desire to secure by Letters' Patent is 1. In an excavating machine. having a' boom and a bucket, the combination of holding said first mentioned means to thereby releasably hold the bucket against movement with relation to the boom. said holding means being operable from the platform of the excavating machine.

4. In an excavating machine having a boom and va bucket., the combination of means for moving said boom and means for holding said first mentioned means to there-l .by releasably hold the bucket against movement with relation to the boom, said last mentioned means including a iiexible element and a brake carried by said boom.

5. `In an excavating machine having a boom and a bucket, the combination or" means for moving said boom and means for holding said first mentioned means to thereby releasably hold the bucket against movement in relatively different positions with relation to the boom, said means including a cable for raising and lowering the boom which is held against movement with respect to the boom.

6. In an excavating machine having a boom and a bucket, the 'combination of means forumoving said boom and means for releasably holding said first mentioned means to thereby hold the bucket against movement with relation to the boom, said means for moving the boom being operable to move said boom when said bucket 1s held.

7. In an excavating machine having a boom and a pivoted bucket, the combination of means for moving said boom and means ideama of means for moving said boom and means for holding said iirst mentioned means to thereby releasably holdthe bucket against movement with relation to the boom, said holding means being operable` from the platform of the excavating machine.`

10. In an excavating machine having a boom and a pivoted bucket, the combination of means for moving said boom and means for holding said first mentioned meansl to thereby releasably hold the bucket against movement with relation to the boom, said last mentioned means including a vflexible element and a brake carried by said boom.

11'. In an excavating machine having a boomy and a pivoted bucket, the combination of means for controlling the movement of said boom and means for holding said irst mentioned means to thereby releasably hold the bucket against movement in relatively different positions with relation to the boom, said means including a cable for raising and lowering the boom which is held against movement with respect to the boom.

12. In an excavating machine having a boom and a pivoted bucket, the combination of means for moving said boom and means for releasably holding said first mentioned means to thereby hold the bucket against movement lwith relation `to the boom, said means for moving the boom being operable to move said boom when said bucket is held.

13. In an excavating machine the combination of a boom-and a bucket, means for moving said boom, means for holding said first mentioned means to thereby hold said bucket against movement, said holding means being operable to release said means for moving said boom to permit said bucket to be moved and means for moving said bucket.

14. In an excavating machine the combination of a bucket'having an openable closure, a bail connected to move with said closure and adapted to have a drag line connected thereto so as to close said closure, and a locking mechanism operated by the drag line to hold the closure in a closed position, said bail and locking mechanism being movable into the interior of the bucket -and being adapted to engage the material in said bucket tothereby cooperate tocause the diS- charge of the material fromsaid bucket.

15. In an excavating machine having a boom and a bucket, the combination of means for movin said boom and frictional vmeans for holding said first mentioned means to thereby releasably hold the bucket against movement with relation to the boom.

16. In an excavating machine having a boom and a bucket, the combination. of means for moving saidboom and rictional means for holding said means for moving the boom to thereby hold the bucket in dumping position.

nov

` 17. In an.: excavating machine having a boom and a bucket, the combination of means for moving said boom and frictional means for holding said first mentioned means to thereby releasably hold the bucketA against movement with relation to the boom, said holding means being operable from the platform of the excavating machine.

18. In an excavating machine having a, boom and a bucket, the combination of means for raising and lowering said boom and frictional means for holding said first mentioned means to thereby releasablyl hold the bucket against movement with relation to the boom, said last mentioned means including a iiexible element and a brake carried by said boom.

19. In an excavating machine having a boom and a bucket, the combination of means for movincr said boom and frictional means' for holdlng said rst mentioned means to thereby releasably hold the bucket against movement with relation to the boom, said means including a cable whereby the boom may be raised and lowered wliichis held against movement with respect to the boom.

20. In an excavating machine having a boom and a bucket, the combination of means for movin said boom and frictional means for releasa 1y holding said rst menoperable to move said boom when said bucket is held.

21. In an excavating machine the combination of a bucket having an openable closure therefor, a bail mounted to move with said closure, a drag line connected to said bail to close said closure, a loop on said bail, a hinged locking mechanism movabl connecting the bail and bucket and a exible connection extended through said loo and united to the drag line at one of its en and to the hinged portion of said locking mechanism at its other end whereby \said mechanism will be operated by the drag line to hold the closure in a closed position.

22. In an excavating machine the combination of a bucket having an openable closure therefor, a bail mounted to move with said closure, a drag line connected to said bail to close said closure,a loop on said bail, a hinged locking mechanism movably connecting the bail and bucket and a lexible- .connection extended through `said loop and united to the dra and to the hinge line at one of its ends portion of said locking mechanismvat its other end whereby said mechanism will be operated by the drag line to hold the closure in a closed position, said bail and locking mechanism being movable into the interior of the bucket and being adapted to engage the material in said -bucket to thereby co-operate to cause the Ydischarge of the material from said bucket.

MORTON E. PUGH. 

